diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/execution/ExternalSystemRunConfiguration.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/execution/ExternalSystemRunConfiguration.java
index 0a15a9e3663d..f3b6219950ff 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/execution/ExternalSystemRunConfiguration.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/execution/ExternalSystemRunConfiguration.java
@@ -334,7 +334,7 @@ public class ExternalSystemRunConfiguration extends LocatableConfigurationBase {
     }
 
     @Override
-    public void coloredTextAvailable(String text, Key attributes) {
+    public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
       super.notifyTextAvailable(text, attributes);
     }
   }
diff --git a/platform/platform-api/src/com/intellij/execution/process/CapturingAnsiEscapesAwareProcessHandler.java b/platform/platform-api/src/com/intellij/execution/process/CapturingAnsiEscapesAwareProcessHandler.java
index 732f2e3f5181..65b5a912ecd6 100644
--- a/platform/platform-api/src/com/intellij/execution/process/CapturingAnsiEscapesAwareProcessHandler.java
+++ b/platform/platform-api/src/com/intellij/execution/process/CapturingAnsiEscapesAwareProcessHandler.java
@@ -66,7 +66,7 @@ public class CapturingAnsiEscapesAwareProcessHandler extends CapturingProcessHan
     }
 
     @Override
-    public void coloredTextAvailable(String text, Key attributes) {
+    public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
       addToOutput(text, attributes);
     }
   }
diff --git a/platform/platform-impl/src/com/intellij/execution/process/ColoredProcessHandler.java b/platform/platform-impl/src/com/intellij/execution/process/ColoredProcessHandler.java
index fa4e1a70ab7c..2720d1dca375 100644
--- a/platform/platform-impl/src/com/intellij/execution/process/ColoredProcessHandler.java
+++ b/platform/platform-impl/src/com/intellij/execution/process/ColoredProcessHandler.java
@@ -67,7 +67,7 @@ public class ColoredProcessHandler extends KillableProcessHandler implements Ans
    * override coloredChunksAvailable method.
    */
   @Override
-  public void coloredTextAvailable(String text, Key attributes) {
+  public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
     textAvailable(text, attributes);
     notifyColoredListeners(text, attributes);
   }
diff --git a/platform/platform-impl/src/com/intellij/remote/ColoredRemoteProcessHandler.java b/platform/platform-impl/src/com/intellij/remote/ColoredRemoteProcessHandler.java
index faebec7c110e..6a4d63dc4e49 100644
--- a/platform/platform-impl/src/com/intellij/remote/ColoredRemoteProcessHandler.java
+++ b/platform/platform-impl/src/com/intellij/remote/ColoredRemoteProcessHandler.java
@@ -38,7 +38,7 @@ public class ColoredRemoteProcessHandler<T extends RemoteProcess> extends BaseRe
   }
 
   @Override
-  public void coloredTextAvailable(String text, Key attributes) {
+  public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
     super.notifyTextAvailable(text, attributes);
   }
 }
\ No newline at end of file
diff --git a/platform/testRunner/src/com/intellij/execution/testframework/Printer.java b/platform/testRunner/src/com/intellij/execution/testframework/Printer.java
index 84810739f127..6f8620ea8bbb 100644
--- a/platform/testRunner/src/com/intellij/execution/testframework/Printer.java
+++ b/platform/testRunner/src/com/intellij/execution/testframework/Printer.java
@@ -32,7 +32,7 @@ public interface Printer {
     AnsiEscapeDecoder decoder = new AnsiEscapeDecoder();
     decoder.escapeText(text, ProcessOutputTypes.STDOUT, new AnsiEscapeDecoder.ColoredTextAcceptor() {
       @Override
-      public void coloredTextAvailable(String text, Key attributes) {
+      public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
         ConsoleViewContentType contentType = ConsoleViewContentType.getConsoleViewType(attributes);
         if (contentType == null || contentType == ConsoleViewContentType.NORMAL_OUTPUT) {
           contentType = ConsoleViewContentType.getConsoleViewType(processOutputType);
@@ -46,7 +46,7 @@ public interface Printer {
     AnsiEscapeDecoder decoder = new AnsiEscapeDecoder();
     decoder.escapeText(text, ProcessOutputTypes.STDOUT, new AnsiEscapeDecoder.ColoredTextAcceptor() {
       @Override
-      public void coloredTextAvailable(String text, Key attributes) {
+      public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
         ConsoleViewContentType viewContentType = ConsoleViewContentType.getConsoleViewType(attributes);
         if (viewContentType == null) {
           viewContentType = contentType;
diff --git a/python/ipnb/src/org/jetbrains/plugins/ipnb/configuration/IpnbConnectionManager.java b/python/ipnb/src/org/jetbrains/plugins/ipnb/configuration/IpnbConnectionManager.java
index da250eebfbd8..327b62d056f1 100644
--- a/python/ipnb/src/org/jetbrains/plugins/ipnb/configuration/IpnbConnectionManager.java
+++ b/python/ipnb/src/org/jetbrains/plugins/ipnb/configuration/IpnbConnectionManager.java
@@ -391,7 +391,7 @@ public final class IpnbConnectionManager implements ProjectComponent {
         }
 
         @Override
-        public void coloredTextAvailable(@NonNls String text, Key attributes) {
+        public void coloredTextAvailable(@NotNull @NonNls String text, @NotNull Key attributes) {
           super.coloredTextAvailable(text, attributes);
           if (text.toLowerCase().contains("active kernels")) {
             serverStarted[0] = true;
diff --git a/python/src/com/jetbrains/python/console/PyConsoleDebugProcessHandler.java b/python/src/com/jetbrains/python/console/PyConsoleDebugProcessHandler.java
index 9399bcae6cb3..efb731088d16 100644
--- a/python/src/com/jetbrains/python/console/PyConsoleDebugProcessHandler.java
+++ b/python/src/com/jetbrains/python/console/PyConsoleDebugProcessHandler.java
@@ -21,6 +21,7 @@ import com.jetbrains.python.debugger.PositionConverterProvider;
 import com.jetbrains.python.debugger.PyDebugProcess;
 import com.jetbrains.python.debugger.PyLocalPositionConverter;
 import com.jetbrains.python.debugger.PyPositionConverter;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.io.OutputStream;
@@ -56,7 +57,7 @@ public class PyConsoleDebugProcessHandler extends ProcessHandler implements Posi
 
     processHandler.addColoredTextListener(new AnsiEscapeDecoder.ColoredTextAcceptor() {
       @Override
-      public void coloredTextAvailable(String text, Key attributes) {
+      public void coloredTextAvailable(@NotNull String text, @NotNull Key attributes) {
         PyConsoleDebugProcessHandler.this.notifyTextAvailable(text, attributes);
       }
     });
diff --git a/python/src/com/jetbrains/python/console/PyConsoleProcessHandler.java b/python/src/com/jetbrains/python/console/PyConsoleProcessHandler.java
index da16f0f2206d..084ca4b6a91d 100644
--- a/python/src/com/jetbrains/python/console/PyConsoleProcessHandler.java
+++ b/python/src/com/jetbrains/python/console/PyConsoleProcessHandler.java
@@ -52,7 +52,7 @@ public class PyConsoleProcessHandler extends PythonProcessHandler {
   }
 
   @Override
-  public void coloredTextAvailable(final String text, final Key attributes) {
+  public void coloredTextAvailable(@NotNull final String text, @NotNull final Key attributes) {
     String string = PyConsoleUtil.processPrompts(myConsoleView, StringUtil.convertLineSeparators(text));
 
     myConsoleView.print(string, attributes);